Mond balls, lots of them.
An example of the element Nickel

Mond balls, lots of them.
This is a whole bunch more nickel balls just like the ones above, only smaller. They come from John Wechselberger who got them from a scrap yard in southern California. If you want some of your own, use the Source link of the balls two samples back, because that eBay seller is how John distributes his samples. Source:John WechselbergerContributor:Theodore GrayAcquired:21 August, 2003Price: $6/poundSize: 0.5"Purity: 99.9%